DICOTYLEDONS. - UMBELLIEERJE. AnthriSCUS* 253 



1. S. verticillatum, leaflets all capillary in whorled segments. 

 p. 90. Moist pastures. 



2. S. inundatum, stem creeping, inferior leaves capillaceo-multi- 

 partite superior pinnatind, umbels generally of 2 rays. p. 91. 

 Inundated places. 



3. S. segetum, stem erect, leaves pinnate, leaflets broadly ovate 

 serrated, radical ones lobed, umbels at first drooping, their rays 

 unequal, p. 91. Fields. 



16. CENANTHE. 



Flowers radiant, those of the disk sessile and abortive. Fruit 

 crowned with the cal. and styles, corky. 



1. CE. fistulosa, root creeping stoloniferous, stem leaves pinnated, 

 their main petiole as well as the stem cylindrical tubular, um- 

 bels of very few rays. p. 9i. Ditches. 



2. (E. pimpinelloides, leaflets of the radical leaves wed<*e-shaped 

 cloven, those of the stem linear entire very long, gen. involucre 

 of several linear leaves, p. 91. Salt marshes. . 



3. CE. crocata, all the leaflets wedge-shaped cut nearly equal, in- 

 volucre of many leaves, p. 91. Ditch banks. , 



B. Umbels with a partial involucre; universal none. 

 17. PHELLANDRIUM. 



Flowers of the disk smallest. Fruit ovate, smooth, crowned 

 with the cal. and styles. 



1. Ph. aquaticum, segments of the leaves divaricated, p. 92. 



Ditches and pools. 



18. CICUTA. 

 Fruit subovate, furrowed. 

 1 . C. virosa, umbels opposite to the leaves, sheaths of the leaves 



obtuse, p. 92. Sides of lakes. 



Partial involucre of 3 leaves, all on one side, pendulous. 

 I. M. Cynapium. p. 92. Fields and gardens. 

 20. SCANDIX. 



Fruit terminated with a very long rough beak. Partial involucre 



cut or pinnated. 

 1. S. Pecten-Veneris, leaflets cut into many linear segments, fruit 



and beak roughish. p. 92. Cornfields. 



21.ANTHRISCUS. 

 Fruit ovate, hispid, with a short glabrous beak. (Pers.) 



1. A. vulgaris, bristles of the fruit hooked, stem smooth, umbels 

 mostly lateral, p. 93. Waste places. 



